Supporting More Web APIs in web-sys

1. Ensure that the .webidl file describing the interface exists somewhere within the crates/web-sys/webidls/enabled directory.

   First, check to see whether we have the WebIDL definition file for your API:

   shCopy

   grep -rn MyWebApi crates/web-sys/webidls
   

   • If your interface is defined in a .webidl file that is inside the crates/web-sys/webidls/enabled directory, skip to step (3).

   • If your interface isn't defined in any file yet, find the WebIDL definition in the relevant standard and add it as a new .webidl file in crates/web-sys/webidls/enabled. Make sure that it is a standard Web API! We don't want to add non-standard APIs to this crate.

   • If your interface is defined in a .webidl file within any of the crates/web-sys/webidls/unavailable_* directories, you need to move it into crates/web-sys/webidls/enabled, e.g.:

     shCopy

     cd crates/web-sys
     git mv webidls/unavailable_enum_ident/MyWebApi.webidl webidls/enabled/MyWebApi.webidl
     

2. Regenerate the web-sys crate auto-generated bindings, which you can do with the following commands:

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   cd crates/web-sys
   cargo run --release --package wasm-bindgen-webidl -- webidls src/features ./Cargo.toml
   

   You can then use git diff to ensure the bindings look correct.